A number of Excel 2007 users have run into various problems when installing or running Real Statistics. Here is a suggestion from Cyberpreneur which may be helpful to you
“to correct the password problem requires installing the Real Stat addin in proper manner. Copy the downloaded file to /Microsoft Office/Office12/Library/Analysis , then restart excel. Then install in normal way.”
Charles
I just want to thank you so very much Charles for this program. This is the most wonderful thing I have seen anyone do in ages.